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. Author manuscript; available in PMC: 2015 Feb 1.
Published in final edited form as: Obstet Gynecol. 2014 Feb;123(2 0 1):325–336. doi: 10.1097/AOG.0000000000000100

Figure 1. Study enrollment and inclusion in placenta case-control analyses.

Figure 1

This analysis compares placental examination results from singleton stillbirth and live birth pregnancies. A pregnancy was categorized as a stillbirth pregnancy if there were any stillbirths delivered and as a live birth pregnancy if all live births were delivered. A fetal death was defined by Apgar scores of 0 at 1 and 5 minutes and no signs of life by direct observation. Fetal deaths were classified as stillbirths if the best clinical estimate of gestational age at death was 20 or more weeks. Fetal deaths at 18 and 19 weeks without good dating were also included as stillbirths.

*Review of only slides or a report from a non-SCRN pathologist, or the placenta having been discarded in labor and delivery before it could be collected by the study staff.

†Mummified stillborn babies are those with Grade IV-V maceration among fragmented babies and Grade V maceration among intact babies.

‡Fragmented placenta only, n=66; mummified stillborn only, n=6; both, n=2.